You were Nezuko's twin but you had the same eyes as your fathers, like Tanjiro. You had some red streaks and crimson eyes, but thats it.

You and Nezuko got turned into demons, as Tanjiro was now a demon slayer. You and Nezuko were in a box, so you dont get burn. At a recovery house for the corps, you and Nezuko came out, as Zenitsu started simping, and Inosuke just looked at you. He was thinking. This is the first time he had seen you ever since he met Tanjiro.